It is mainly an ambush predator of fish but also feeds opportunistically on other animals that fall into the water such as terrestrial invertebrates. Often found in counter current zones of principal rivers and creeks. Distribution, habitat and ecology Īcross most of northern South America, Brazil, Colombia, Venezuela, Guyana, French Guiana, Suriname and the island of Trinidad. The Principle of Priority of the International Code of Zoological Nomenclature therefore means that the name Hoplias aimara has precedence. macrophthalmus, referred to the same taxon. There were thought to be two species of giant trahiras Hoplias aimara (Valenciennes, 1846) and Hoplias macrophthalmus ( Pellegrin, 1907), each described from French Guiana, study of the type-specimens of each species showed that both names, H. Although it seems docile, the fish has been known to attack divers and swimmers, however there is rarely a fatal ending. The colour can be almost solid black through to pale brownish gold colour with marked dark stripes. There are normally small spots visible on the upper anterior part of the body including the head, the patterning can vary geographically. the colour is basically brown with a lighter base colour, although shades can vary, with a number of vertical patches or stripes. This species has an elongated cylindrical shape. This is the largest of the Hoplias species with specimens caught at a length of 120 cm (47 in), the largest rod and reel record stands at 101 cm (40 in). aimara is a good bioindicator of such contamination. In Amazonia, the native populations are concerned by high levels of mercury contamination which have been linked to the consumption of contaminated fish. Hoplias aimara, also known as anjumara, traíra, trahira, manjuma, anjoemara and wolf fish, is a species of freshwater fish found in the rivers of South America. Hoplias macrophthalmus ( Pellegrin, 1907)
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